Your Experience with Exhaust Manifold Bolts? - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 08-17-2019, 08:36 AM Thread Starter
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Your Experience with Exhaust Manifold Bolts?

I am replacing the passenger side exhaust manifold on my '03. Do any of you have recommendations or tips? Currently, I am soaking the bolts in penetrating oil every night until I begin the job this upcoming week. I plan on removing the fender well too.
Thank you.
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post #2 of 10 Old 08-17-2019, 10:09 AM
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Best tip i can give you is DONT BREAK ONE OFF

i know....it just happens sometimes.

Some swear that pulling them cold is the best. Some say hot is the best.

Ive always pulled fenderwell and started breaking them loose. if i get a stubborn one i start the truck and let it run for a minute and see if i can get it. I repeat until it comes out.

I have had all bolts come out without an issue on a truck with 220k on stock manifolds.

I have had 3 break off on a truck with 90k miles.

Heat can definitely be your friend though. And the very best way to heat is to run the truck as it heats the head.
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post #3 of 10 Old 08-17-2019, 01:03 PM
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Once you get them out, replace them in case you need to get in again. Stripping the Allen head and partial stripping the Allen head is what got me. I changed the drive’s side, but brought it to the shop for the passenger side. My hands couldn’t fit in to get most of the bolts loose. I quit before I got myself to a point where I had to tow it. I have also had luck breaking bolts loose with some CRC cold spray. Spray for about 30 seconds, and then loosen.

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post #4 of 10 Old 08-17-2019, 01:26 PM
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When I did my heads, I took mine off out of the truck once the head was removed but they all came out pretty easy. When I put the manifolds back on it was with the heads on the engine and it wasn't fun.. I had my fender skirt off so it made it a bit easier. If you are only doing one side might be worth pulling the inner fender out as it's not too hard to get out.
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post #5 of 10 Old 08-17-2019, 07:30 PM
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You're not really doing anything with the penetrating oil.

I used my Ridgid impact driver on the driver's side, zipped them right off. But my truck is from Cali desert so no rust. Don't know your situation.

You could try them with a ratchet, and if they don't want to loosen just cut the head off. That way you can get to the threads with penetrating oil. If you break one with ratchet, it'll most likely break right at the head surface then that involves drilling and possibly head removal if you can't get a drill to it.

If you cut it off, then you can use a torch to heat it up and a spray bottle with water to quench it. That usually shocks the rust enough to allow it to come out
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post #6 of 10 Old 08-17-2019, 10:26 PM
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When my mechanic removed my exhaust manifolds he told me he did not have a problem removing any of the bolts. As a matter of fact I had to go to my local Ford dealer and buy three new bolts with the spacers because he found three of them were missing.
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post #7 of 10 Old 08-18-2019, 06:31 AM
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spray em a few days before hand with some pb blaster if you have the opportunity to do so

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post #8 of 10 Old 08-18-2019, 12:52 PM Thread Starter
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Quote:
Originally Posted by repalmer View Post
You're not really doing anything with the penetrating oil.

I used my Ridgid impact driver on the driver's side, zipped them right off. But my truck is from Cali desert so no rust. Don't know your situation.

You could try them with a ratchet, and if they don't want to loosen just cut the head off. That way you can get to the threads with penetrating oil. If you break one with ratchet, it'll most likely break right at the head surface then that involves drilling and possibly head removal if you can't get a drill to it.

If you cut it off, then you can use a torch to heat it up and a spray bottle with water to quench it. That usually shocks the rust enough to allow it to come out
Wow thanks for the good info, appreciate that.

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post #9 of 10 Old 08-21-2019, 07:19 AM
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When you replace the manifold bolts, check with ARP, I believe they have the titanium set for something like $30.
Are you replacing the manifolds?

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post #10 of 10 Old 08-21-2019, 07:22 AM
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In the past, when we did manifold bolts in my shops we would heat them with a torch. The best lubricant out there to break them babies free will be Kroil.
It's $20 a can but it will loosen them. Soak overnight. Spray multiple times a day too.

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